<!DOCTYPE html>
<html lang="en">


<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        li {
            list-style: none;
        }

        div {
            width: 600px;
            height: 100px;
            background-color: pink;
            margin: 100px auto;
        }

        div ul li {
            float: left;
            width: 50px;
            height: 50px;
            background-color: #fff;
            line-height: 50px;
            text-align: center;
            margin-left: 25px;
            margin-top: 20px;
            border: 1px solid green;
            border-radius: 25px;
            transition: all 2s;
        }

        div ul li:hover {
            transform: scale(2, 2);
        }

        div a {
            text-decoration: none;
            font-size: 18px;
        }

        div ul li:hover a {
            color: hotpink;
        }
    </style>
</head>

<body>
    <div>
        <ul>
            <li><a href="#">1</a></li><a href="#"></a>
            <li><a href="#">2</a></li>
            <li><a href="#">3</a></li>
            <li><a href="#">4</a></li>
            <li><a href="#">5</a></li>
            <li><a href="#">6</a></li>
            <li><a href="#">7</a></li>
        </ul>
    </div>
</body>

</html>